730 IDAHO MINING DISTRICTS. 



is quite a striking leaf, being made so by the regular, sharp-pointed 

 teeth and the parallel craspedodrome secondaries. 



This species is closely allied to the preceding species, Q. consimilis, 

 and it is possible that it may belong to it. It appears to differ in its 

 larger size, larger and stronger teeth, and particularly in being toothed 

 entirely to the base, whereas Q. consimilis is without teeth for nearly 

 or quite one-third of its length. A larger series may show them to 

 be identical. 



Locality: Two miles southeast of Marsh post-office, Boise County, 

 Idaho. 



QUERCUS SIMPLEX Newby. 

 Proc, U. S. Nat. Mus., Vol. V, p. 505, 1883; plates ined., PI. XLIII, fig. 6. 



There are two or more fairly well preserved examples that appear 

 to belong to this species. 



Locality: One mile southeast of Marsh post-office, Boise County, 

 Idaho. 



QUERCUS PAYETTENSIS n. sp. 



PL CII, fig. 9. 



Leaves of firm texture, lanceolate in outline ; margin deeply sinuate- 

 toothed, the teeth rather obtuse, the sinuses deep, rounded; midrib 

 strong; nervation craspedodrome; secondaries as many pairs as there 

 are teeth, alternate, at an angle of about 45, passing straight to and 

 entering the teeth ; finer nervation not retained. 



This species is founded on the example figured and one or two addi- 

 tional fragments. The figured specimen is the most perfect, though 

 lacking both base and apex. It is now about 4.5 cm in length and 

 1.75 cm in width. It was probably not far from 7 cm in length when 

 perfect. 



This species has comparatively little resemblance to either of the 

 species of Quercus detected thus far in the Payette formation. It is 

 perhaps closest to Q. consimilis Newb. (PI. IV, fig. 6), but differs 

 markedly in being longer, narrower, and in having much stronger 

 teeth. Quercus furcinervis Rossm., 1 from Bridge Creek, Oregon, is 

 somewhat similar, being, however, very much larger and with rela- 

 tively much smaller teeth. 



Locality: Silicified shale, Jackass Creek, 1 miles above its junction 

 with the Payette River, Boise County, Idaho. 



QUERCUS ? sp. 



There is a single fragment that appears to belong to this genus, but 

 it is too much broken to permit identification. It is a leaf that must 

 have been 12 cm or 14 cm in length and about 5 cm in width. The basal 



i Lx., Cret. & Tert. PI., PI. LIV, fig 2. 



